Home / 13,739.90-20,609.63-4,379.79

Finding the Fourth Proportional to 13,739.90, 20,609.63 and 4,379.79

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Solution

The fourth proportional to 13,739.90, 20,609.63 and 4,379.79 is: 6,569.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,739.90 : 20,609.63 = 4,379.79 : x
  2. Step 2: Convert to fraction form
    13,739.90/20,609.63 = 4,379.79/x
  3. Step 3: Cross multiply
    13,739.90x = 20,609.63 × 4,379.79
  4. Step 4: Simplify right side
    13,739.90x = 90,265,851.38
  5. Step 5: Solve for x
    x = 90,265,851.38/13,739.90
  6. Step 6: Final answer
    x = 6,569.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.